Cable-guard for carrier pulleys or trolleys



E. A. ROESELER. CABLE GUARD FOR CARRIER PULLEYS 0R TROLLEYS. APPLICATION FILED MAY 24, 1920.

1 ,397,659. Patented Nov. 22,1921..

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UNITED STATES EMIL A. ROESELER, OF JUNEAU, WISCONSIN.

PATENT OFFICE.

CABLE-GUARD FOB CARRIER PULLEYS OR TROLLEYS.

Application filed May 24,

T 0 all whom it may concern Be it known that I, EMIL A. Ronsnnnn, a citizen of the United States, residing at Juneau, county of Dodge, and State of Wisconsin, have invented new and useful Improvements in Cable Guards for Carrier Pulleys or Trolleys, of which the following is a specification.

My invention relates to improvements in cable guards for carrier pulleys or trolleys.

The object of my invention is to provide an improved guard, in which friction upon the cable is reduced to a minimum; also to provide a form of guard which will yield resiliently to allow the pulley or trolley to be released from the cable, or to allow it to pass a cable supporting member or post, my improved guard being adapted to pass such posts with minimum friction thereon, and minimum impact or impact effect.

More specifically stated, it is the object of my invention to provide acable guard adapted. to rotate in a substantially horizontal plane about an axis located at one side of the plane in which the pulley or trolley moves, the axial support for said rotary member being held in its normal position by a spring, and supported to swing outwardly against the spring tension under pressure applied to the rotary member in the plane of the pulley.

In the drawings Figure 1 is a side elevation of a carrier pulley, and its harp or hanger member, embodying my invention.

Fig. 2 is a vertical sectional view of the same, on line 2-2 of Fig. 1.

Fig. 3 is a horizontal section on line 3-3 of Fig. 1.

Like parts are identified by the same reference characters throughout the several views.

The pulley 1 is adapted to travel along an overhead track or cable indicated by dotted lines at 2. The pulley supporting member or harp 3 may be of ordinary construction. As illustrated, it is provided with a base 4 which supports a hanger 5 directly under neath the pulley 1. The upper or head portion of the harp comprises a frame or yoke member '7, within which the pulley is journaled upon a shaft 8.

The parts thus far described may be of any ordinary construction, and further description thereof is therefore deemed un necessary.

But it will be observed that the base of the Specification of Letters Patent.

Patented Nov. 22, 1921.

1920. Serial No. 383,788.

harp is provided with a recess 10, adapted to recelve the base portion 11 of a swinging post 12, the base portion 11 of the post being fitted to the recess, and pivoted to the, harp by a cross pin or pintle 13. This portion 11 of the post is preferably provided with a stop pro ection 14, adapted to bear upon the wall 15 of the recess when the post is swung outwardly to the positionindicated by dotted lines in Fig. 2. A spring 16, secured to the harp at 17 has its free end arranged to bear upon the outer side of the post 12 to hold it in its normal position with its upper end portion 18 engaged in a recess 19 formed in the cross arm 20 of the harp.

. A disk 22 has a hub portion 23 journaled on the post 12 between its base portion 11 and its upper portion 18, the base portion 11 having a shoulder at 24: upon which the hub 23 may bear. A cotter pin or other suitable retaining device may be applied to the post 12 above the disk 22 to prevent the latter from moving upwardly along. the post.

When the post 12 is in normal position, the upper surface of the disk 22 will lie in a horizontal plane, and on one side of the post this disk will extend underneath the pulley or trolley 1 and the cable or trackway 2, upon which the pulley runs, the disk being in sufiicient proximity to the pulley to pre vent a release of the cable or trackway from the pulley groove. Any upward movement of the pulley relatively to the cable or track 2 will, of course, be transmitted simultaneously to the disk 22, which is supported from the pulley, and therefore such movement will be limited when the disk 22 contacts with the cable or track. Relative movements of the cable and pulley may arise from various causes, such as vibration of the cable or trackway, accumulation of snow or ice thereon, or any obstruction which the pulley may strike while moving rapidly along the track, and in any such case the destructive impact, and frictional contact of the guard upon the underside of the cable or trackway is largely relieved by its rotation. about the vertical axis supported by the post 12. Instead of scraping along the underside of the cable or track, the guard rotates freely and the ef fect of the impact is more nearly like that of a glancing blow than would be the case if the guard were non-rotatable.

The outer margin of the rotary member 22 being circular in form, and the post 12 being located in an offset position with reference to the pulley, it is obvious that any vertically ex- 7 tending support for the track or cable, such,

for example, as the bracket 26, will also be.

struck by the rotary member 22 with a glanc ing blow, and the free rotation of the member 22 will cause the post 12 to be pressed outwardly until the member or disk 22 may ported'to rotate in a substantially horizontal plane about an axis offset from the pulley, one'side portion of Said rotatable member projecting underneath the pulley and in sufficient proximity thereto to prevent a release of the pulley from the" track upon which it runs. f

2. The combination with a carrier pulley and its harp, of a rotary guard disk carried by the harp with one side portion projecting underneath the pulley in sufiicient proximity thereto to prevent the latter from becommg accidentally released from the track, and means for allowing said guard disk to swing laterally from beneath the pulley.

3. The combination with a carrier pulley and its harp, of a post pivoted to the harp at its lower'end and provided with upwardly extending ournal, rotary member journaled on the post and projecting at one side thereof underneath the pulley. 1

4:. The combination with a carrier pulley V and itsharp, of a post pivoted to the harp at its lower end and provided with an up wardly extending journaha rotary member j ournaled on the post and projecting at one side thereof underneath the" pulley, and

7 means for normally retaining the journal in a substantially upright position.

The combination with a carrier pulley and its harp, of a post pivoted to the harp at its lower end and provided with an upwardly extending journal, a rotary member journaled on the post and projecting at one side thereof underneath the pulley, and means for resiliently holding said post with m ta its journal in a normally upright position while allowing it to swing outwardly under pressure applied to the portion of the rotatable member which is underneath the pulley.

6. The combination with a carrier pulley and it harp, of a post pivoted to the harp at its lower end and provided with an upwardly extending journal, a rotary member journaled on the post andprojecting atone side thereof underneath the pulley, and means for resiliently holding said post with t jour in 2i no y up ht PQs ti while allowing it to swing outwardly under pressure applied to the portion of'the r0 tatable member which is underneath the pulley, said rotary member having a circular outer margin adapted to strike with a glancing blow against a track support underneath the pulley. V

7. The combination with a carrier pulley and its harp, of a post pivoted to the harp at its lower end and provided with anupwardly extending j ournal ,a rotary member j ournaled on the post and'projecting at one side thereof underneath the pulley, a stop in a position to limit the inward movement of the post, a second stop to limit its outward movement, and a spring normally: holding the post against the first mentioned stop.

8..A carrier pulley mechanism including a mainpulley and a disk guard rotatable in a plane at right angles to said main pulley upon an axis offset from the main pulley, said disk guard having a flat portion projectingdirectly across the margins of, and

' spaced from, said main pulley.

9. A. carrier pulley mechanismprovided with a guard rotatable in a plane at right angles to the pulley about an axis ofi'set from the pulley with one margin of the guard in position to prevent the pulley from leaving its track, and means for allowing the guard to yield resiliently laterally to the plane inwhich the pulley travels.

In testimony whereof I allix my signature in the presence or two witnesses.

. min A. nonsnnnn.

Witnesses:

' A VIN H. PLUGKHAN, F. V. RQHHDE. 

